121110202091 has 2 divisors, whose sum is σ = 121110202092. Its totient is φ = 121110202090.

The previous prime is 121110202009. The next prime is 121110202093. The reversal of 121110202091 is 190202011121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121110202091 is a prime.

Together with 121110202093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121110202093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555101045 + 60555101046.

It is an arithmetic number, because the mean of its divisors is an integer number (60555101046).

Almost surely, 2^121110202091 is an apocalyptic number.

121110202091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121110202091 is an equidigital number, since it uses as much as digits as its factorization.

121110202091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 121110202091 in words is "one hundred twenty-one billion, one hundred ten million, two hundred two thousand, ninety-one".